1 files changed, 21 insertions, 12 deletions

diff --git a/src/multimedia/audio/qaudiooutput_alsa_p.cpp b/src/multimedia/audio/qaudiooutput_alsa_p.cpp
index e8a3f5c..0d37d61 100644
--- a/src/multimedia/audio/qaudiooutput_alsa_p.cpp
+++ b/src/multimedia/audio/qaudiooutput_alsa_p.cpp
@@ -57,6 +57,8 @@ QT_BEGIN_NAMESPACE
 
 //#define DEBUG_AUDIO 1
 
+static const int minimumIntervalTime = 50;
+
 QAudioOutputPrivate::QAudioOutputPrivate(const QByteArray &device, const QAudioFormat& audioFormat):
     settings(audioFormat)
 {
@@ -271,6 +273,7 @@ bool QAudioOutputPrivate::open()
     qDebug()<<now.second()<<"s "<<now.msec()<<"ms :open()";
 #endif
     timeStamp.restart();
+    elapsedTimeOffset = 0;
 
     int dir;
     int err=-1;
@@ -304,69 +307,69 @@ bool QAudioOutputPrivate::open()
     err = snd_pcm_hw_params_any( handle, hwparams );
     if ( err < 0 ) {
         fatal = true;
-        errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_any: err = %1")).arg(err);
+        errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_any: err = %1").arg(err);
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_rate_resample( handle, hwparams, 1 );
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_rate_resample: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_rate_resample: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_access( handle, hwparams, access );
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_access: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_access: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = setFormat();
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_format: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_format: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_channels( handle, hwparams, (unsigned int)settings.channels() );
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_channels: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_channels: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_rate_near( handle, hwparams, &freakuency, 0 );
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_rate_near: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_rate_near: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, &dir);
         if ( err < 0 ) {
             fatal = true;
-                errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_buffer_time_near: err = %1")).arg(err);
+                errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_buffer_time_near: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, &dir);
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_period_time_near: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_period_time_near: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params_set_periods_near(handle, hwparams, &chunks, &dir);
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params_set_periods_near: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_periods_near: err = %1").arg(err);
         }
     }
     if ( !fatal ) {
         err = snd_pcm_hw_params(handle, hwparams);
         if ( err < 0 ) {
             fatal = true;
-            errMessage = QString(tr("QAudioOutput: snd_pcm_hw_params: err = %1")).arg(err);
+            errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params: err = %1").arg(err);
         }
     }
     if( err < 0) {
@@ -404,6 +407,8 @@ bool QAudioOutputPrivate::open()
     // Step 6: Start audio processing
     timer->start(period_time/1000);
 
+    timeStamp.restart();
+    elapsedTimeOffset = 0;
     errorState  = QAudio::NoError;
     totalTimeValue = 0;
     opened = true;
@@ -500,7 +505,10 @@ int QAudioOutputPrivate::bufferSize() const
 
 void QAudioOutputPrivate::setNotifyInterval(int ms)
 {
-    intervalTime = ms;
+    if(ms >= minimumIntervalTime)
+        intervalTime = ms;
+    else
+        intervalTime = minimumIntervalTime;
 }
 
 int QAudioOutputPrivate::notifyInterval() const
@@ -629,8 +637,9 @@ bool QAudioOutputPrivate::deviceReady()
     if(deviceState != QAudio::ActiveState)
         return true;
 
-    if(timeStamp.elapsed() > intervalTime && intervalTime > 50) {
+    if((timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) {
         emit notify();
+        elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;
         timeStamp.restart();
     }
     return true;